<!--
 * @Author: jswang
 * @Date: 2021-07-20 13:39:24
 * @LastEditTime: 2021-07-21 10:37:50
-->
<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps
        :active="activeIndex - 0"
        finish-status="success"
        :align-center="true"
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-position="top"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 图片上传 
            action 图片上传到服务器的地址
            picture upload 组件渲染出来的效果
            -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
              <quill-editor v-model="addForm.goods_introduce">
              </quill-editor>
              <!--添加商品的按钮 -->
              <el-button type="primary" class="btnAdd" @click="addGoods">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
  title="图片预览"
  :visible.sync="previewDialogVisible"
  width="50%"

>
  <img :src="previewPath" alt="" class="previewImg">
</el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: 0,
      //添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类数组
        goods_cat: [],
        //图片的数组
        pics:[],
        //商品的详情
      goods_introduce:'',
      attrs:[],
      },
      //添加商品的表单数据验证规则对象
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      //商品分类数据
      catelist: [],
      cateProps: {
        expandTrigger: 'hover',
        //看到的
        label: 'cat_name',
        //选中的
        value: 'cat_id',
        //子分类关联字段
        children: 'children'
        // checkStrictly
      },
      //动态参数列表数据
      manyTableData: [],
      //静态属性列表数据
      onlyTableData: [],
      // 上传图片的url
      uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传最贱的headers请求头对象
      headerObj:{
        Authorization:window.sessionStorage.getItem('token')
      },
      //预览图片地址
      previewPath:'',
      previewDialogVisible:false,
      
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败')
      }
      this.catelist = res.data
    },
    //级联选择器变化,触发这个函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('likai:'+activeName)
      // console.log('进入:'+oldActiveName)
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    //tab 被选中时触发
    async tabClicked() {
      //访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'many'
            }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
        //静态属性获取
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'only'
            }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败！')
        }
        console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    //处理图片预览效果
    handlePreview(file){
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    //处理移除图片的操作
    handleRemove(file){
      //1.获取将要删除的图片临时路径
      const filePath = file.response.data.tmp_path
      //2.从pics数组中,找到这个图片对应的索引值
      const index = this.addForm.pics.findIndex(x=>x.pic === filePath)
      //3.调用数组的 splice 方法,把图片信息对象,从pics数组中移除
      this.addForm.pics.splice(index,1)

      console.log(this.addForm)
    },
    //监听图片上传成功事件
    handleSuccess(response){
      //1. 拼接得到图片信息对象
      const picInfo = {pic:response.data.tmp_path}
      //2.将图片信息对象,push到pics数组中
      this.addForm.pics.push(picInfo)

      console.log(this.addForm)
    },
    //添加商品
    addGoods(){
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid){
          return this.$message.error("请填写必要的表单项")
        }
        //执行添加的业务逻辑
        // lodash  cloneDeep()
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        //处理动态参数
        this.manyTableData.forEach(item=>{
          const newInfo = {
            attr_id:item.attr_id,
            attr_value:item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        //处理静态属性
        this.onlyTableData.forEach(item=>{
          const newInfo={
            attr_id:item.attr_id,
            attr_value:item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form.attrs)
        //发起请求添加商品
        //商品名称,必须是唯一的
        const {data:res} = await this.$http.post('goods',form)
        if(res.meta.status !== 201){
          return this.$message.error("添加商品失败!")
        }
        this.$message.success("添加商品成功!")
        //编程式导航跳转
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewImg{
  width:100%
}
.btnAdd{
  margin-top:15px;
}
</style>
